The coolant flows through the heads first, then the block. Keeps the heads cooler, less chance of detonation....

Tim

 

Are the water jackets in different locations? Or would these type of heads work on the older style small blocks? I'm told these are for '92 and up motors.

 

They can be converted to run with older blocks, but bolt on is only with the 92-96 LT1 engines.

Tim

 

While they will bolt on to older blocks, the cooling passages don`t line up, so no, they won`t work on older small blocks.

 

Can these be used on any '92-'96 small block, including 305's?

 

Only LT1 engines, unless you have the heads converted (drill coolant passages)
As far as I know the LT1 came in 5.7L, and 4.3L only (Camaro, Firebird, Caprice and Corvette).

Tim

 

What does the "LT-1" stand for, what is the difference between them and a regular 350?

 

Do a qweb search...there is pages upon pages of indepth info out there....try this for starters:
http://www.fierolt1.com/technical_documents_main.htm

http://www.autosite.com/garage/encyclop/ency02f.asp

http://www.n2performance.com/cgi-bin/UltraBoard/UltraBoard.cgi?BID=4&TID=10&action=Read

 

LT-1 (notice the hyphen) was the GM option code for the "special-high-performance" 350 offered in Corvettes & Camaros in the very early '70s. They used the same blocks as the low-performance 350's of the time, but made 60-70 more horsepower.

The '92-'96 LT1 (no hyphen) was also a high-performance 350, but it was based on a block with a different cooling system design (reverse-flow) from that of the standard 350's from the same period.